Note 5 - Revenue (Details Textual) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Jan. 12, 2024	Dec. 31, 2022	Nov. 30, 2022
Revenues		$ 28,700	$ 7,379
Income Tax Expense (Benefit)		260	261
Deferred Revenue, Current			0
The 2024 ATI-RRPV Contract [Member]
Government Assistance, Award Amount, Initial Award		134,200
Government Assistance, Additional Funding Possible		326,500
The 2024 ATI-RRPV Contract [Member] | Maximum [Member]
Government Assistance, Award Amount		460,700
Government Assistance Award, Amount, Initial Award Fixed Fee		$ 67,900
The 2024 ASPR-BARDA Contract [Member]
Government Assistance, Award Amount				$ 9,300
Foreign Tax Jurisdiction [Member] | National Tax Agency, Japan [Member]
Royalty Withholding Tax		5.00%
Income Tax Expense (Benefit)		$ 200	200
Royalty [Member] | Daiichi Sankyo Collaberation and License Agreement [Member]
Royalty Percentage		4.00%
Revenues		$ 0	0
Non Cash Royalty Revenue [Member]
Revenues		3,842	3,920
Non Cash Royalty Revenue [Member] | Daiichi Sankyo Collaberation and License Agreement [Member]
Revenues		3,800	3,900
Government Contract [Member]
Revenues		24,858	0
Unbilled Contracts Receivable		6,200
Deferred Revenue, Current		65,400	0
Government Contract [Member] | The 2024 ATI-RRPV Contract [Member]
Revenues		16,200
Deferred Revenue, Current		64,800	0
Government Contract [Member] | The 2024 ASPR-BARDA Contract [Member]
Revenues		8,700
Deferred Revenue, Current		600	0
Grant [Member]
Revenues		$ 0	$ 3,459
Deferred Revenue, Current						$ 2,000
Grants Receivable					$ 3,500	$ 3,500
Grant Milestone Completion [Member]
Revenues	$ 1,500